Hydraulic digger



Junels, 1933. V l P. BLUMBERG HYDRAULIC BIGGER ii''lea may 1a. 1929 4 Smets-sheet 1 'June 13, 1933. P. 'BLUMBERG Er AL 1,913,472

mgnwmc BIGGER und nay 18.1929 4 sheets-Sheet. 2

4 .Marvel June. 13, 1933.

P. BLUMBERG Er AL 1,913,472

HYDRAULIC DIGGER I Filed Mag 18,'1929 4 sheets-shear. 4

rammed. .lune- 13,: 1933 UNITED STATES" Pari-:Nr ori-*lcs PAULBLmEBG, NEW HOLSTEIN, WISCONSIN, AND IBAN! G; ROUGH,l F CHIGAGO. ILLINOIS, ABSIGNORS T0 `T/'JCIZILLIAIMI MITCHELL BLAJR, OF CHICAGO, ILLINOIS HYDRAULIC BIGGER Application led Hay 168, 1929.y Serial No. 364,215.

This invention relates to hydraulic diggers, and more particularly to the provision. of

` such a construction adaptedy for attachment with a tractorv4 or prime mover, and adapted to lift materia-l to a. relatively great altitude, or to intermediary positions.-

Among the objects of our invention, are to provideV a hydraulic digger and loader of novel construction, 'and adapted to be readily operated by the operator of the tractor or prime mover; further to provide a novel construction of lifting means for said digger and loader; further to prov-ide a novel means of attaching the mechanism to a tractor or prime mover,so that the thrust on the mechanism,

due to the lifted load, will be more effectively4 and .evenly distributed over the. tractor or prime mover, and will beeliminated from the rear axle'thereof to providea novel construction wherein the various members mak-v ing Aup lthe mechanism are so constructed that replacements and adjustments may be readily accomplished; further to provide a hydraulic digger and loader of maximum simplicity, efficiency, economy and ease of operation; and

such further objects, advantages, and capabilities, as will later more fully appear.

Our invention furtherl resides'in the combination, construction and .arrangement of parts illustrated in the accompanying drawlngs, and'while we have shown therein a preferred embodiment, we desire it t0 berunderstood that 'the same is susceptible of modifica'- tion and change, without departing. from 'the spirit of our invention.

In the drawings:

Fig. 1 is a View m side" elevation'of our u hydraulic digger and`loader,'disclosin0 the same as combinedwith a tractor, and s owing the bucket both in raised and lowered position.

Fig. 2 isa top plan '.v-1ew of the entire mechanism.

Fig. 3 1s a'jviewin end elevation, with a u part thereof broken away, and showing the attachmentof the elevating lmechanism to the tractor.

Fig.` .4 is a fragmentary view in-c'ross sec- I tion taken on the line 4-4 of Fig. 2.

Fig.Av 5 is a fragmentary horizontal cross sectional view takenon the line 5 5 of Fig. 4.

v Fig. 6 is a fragmentary view. in vertical The booms for raising the bucket compriseV a tubular arm 4, secured to a'split casting 5,

which casting is pivotally mounted uponfthe shaft 6, transversely dis osed at the'rear of lthe tractor 1, and attac ed to the guards 7 7 and 8 by means of the Ubolts 9 and 10. The

U-bolts 9 and'lO pass around the shaft 6 and are drawn tight to'hold the shaft in .position ,by nuts which engage the threaded end of the lU-bolts on the inner side of theguard. Other attaching means, however, may be used to connect the shaft to the tractor and .hold the same in a rigid horizontal position.

The 'enlarged ends or hubsl 11 of the shaft 6 are provided with an annular groove 12, adapted to receive the split casting 5, which en ages and is drawn into place sulliciently tig t to permit rotation, bythe bolts 13 and 14, as is shown in Figs. 6 andiY of the drawings. The casting 5 engages the annular ring 12, and is prevented froml lateraldisplace ment by the flanged sides 15 of this groove 12.

If heavy material is being loaded or removed by the mechanism, it may be desirable to provide shims 16 vbetween the shaft 6 V:ind the guards 7 and 8 to more adequately distribute the load transmitted from the bucket, to the shaft 6 and the guards 7 and 8. The advantage vof-providing this shaftv 6 at the booms to the axle or other part or parts of the tractor, which might be d on'e, is to distribute the hload over a greaterarea and insuro5' 'y rear of thetractor and connecting the booms' 4 thereto, in preference to" connecting these 1 of the tractor, the arm 17 at the central portion of the tractor isbent inwardly and @cxtends forwardly and inwardly of the front wheel 2, and at its forward end is normal to the bucket 19. As clearly shown in Fig. 6 of the drawings, the shaft 17 will butt against the casting 5, when a slight amount of pressure is applied to the bucket 17 or forward end of this shaft.' By this construction of the boom and its attachment to the shaft,

.20 the entire thrust in digging or loading position is taken directly against the shaft 6, and distributed to the guards 7 and 8 over an enlarged area thereof. -The guards 7 and 8 are provided with outstanding anges 7 a and 8a respectively, which are connected to the cross member 8b which in turn' is suitably connected to the tractor 1.

' The guide lugs 2O on the forward end of the arm 17, engage the vertical T-beams 21', which are mounted on the opposite sides of the forward end of the tractor. These T-beams 21 are rigidly connected to the angleiron 22,

which is transversely disposed on the longitudinal channels 23, on opposite sides -of the tractor frame-work, and to a cylinder bracket 24. Knee brackets 25 are further provided for bracingvthe upright beams, which knee brackets are in turn attached tothe cylinder bracket 24, and the downwardly extending 4 ends 26 of which, are attached to the brackets 27 beneath the channels .23. Diagonal i bracing means 28, such as rods, angles or other suitable connection, are attached to the housk ing, rear guard or frame work of the tractor at their lower end and to the flanges of the upright T-beam at their upper end. The

' construction of these diagonal bracing means v provides a rigid construction and holds the upright members in fixed position.

im Cables 29 are attached by any suitable nieans to the bucket 19. Thesecables pass over an upper pu1ley30, and then over a lower pulley 31, and the upper end of.' the cable is then attached to a' cross-head 32, thus providing'a three part line for increasing the Nspeed oflift of the bucket. This cross head 32 is mounted onv the upper end of the piston rod 330i a piston (not disclosed) mounted in 'the cylindrical casing 34. The lower i l C', portion of thegcylindrical casing 34 is mounted on the bracket-24, and its upper end is braced bya means of the plate 35,l provided with af U-bolt 36, passing around the cylinder or casi 34. The piston rod is enclosed and v 35 i protec 'from the grit and dirt by, means normall operative position.

of a collapsible canvas boot 37. Hydraulic means 38, located in the tractor 1, havin an intake 39 and outlet pipeline 39, rovides themeans for' raising and llowering t e bucket 19. These hydraulic means may b e of any w suitable design or construction, which are .readily and easily attached to the tractor and y connected to the casing 34.

In order to trip the bucket or scoop when desired, we provide a latching or tripping mechanism, including apair of latches 40, mounted upon a shaft 41 suitably journalle'd in the top of the arcuate bucket brackets 18, which brackets in turn are pivotally connected to the under side of the bucket 19. Mounted at the top and on the interior Wall 43, of the bucket 19, is an angle iron 44 adapted to be engaged by the latches -40. Springs 45 attached to the arm member 18, and engaging the latches 40, normally hold the latches in engagement with the bucket, although the springs do not .prevent the ready disengagement ofthe latches from the latch plateor angle 44, by the operator. A lever arm 46 is mounted upon the extended end of the shaft 41, and is attached at upper end to a rod 47, journalled in the bracket or arm 48. The rod 47 is provided with a handle 48, conveniently located adjacent to the operators seat.

In order'to control the degree of tipping of the bucket 19, springs 49 are attached to the sleeve 18a, and are connected tothe chain 50, which in turn is attached to the bucket 19. The length of chain and the degree of resiliency of the spring determines the'range of the tipping of the bucket. Either the length of the chain 50 may be varied or a spring having a greater or less-degree of resiliency may be provided to give the degree of tipping of the bucket thatis desired.

' In initial or loading operation, the bucket is generally lowered to the position shown. in Fig. 1 of the drawings. After the bucket has -been loaded, the operator, by suitable.

' hand controlled levers, operates the hydraulic means to force the lfluid under pressure through the intake pipe, to the base of the cylinder 30, and thus forcing upwardly the piston inthe cylinder casing 34. lWhen the bucket has beenv raised to the position or altitude desired, the operator, by means of the hand controlled levers, causes the flow of the fluid to cease, and hold the bucket in that position. -The operator then pulls upon the handle 48, disengaging the'trip mechanism from the bucket and allowing the bucket to discharge its load. nThe operator next lowers the bucket by moving the hand controlled. levers 'to allow the fluid to flow back into the compressing chambers of -the hydraulic means. As the bucket, touches the ground, it

is tilted upwardly, and the latches willengage. the rear edge of the bucket for holding it in 13'0 9.5 vided with hubs,` telescoping lbooms claim:

.1. In a hydraulic digger and loader mount,- ed on a tractor, telescoping booms at the opposite sides of said tractor, a shaft on the rear of said tractor and spaced from'the rear axle thereof, said booms being ivotally mounted on said shaft whereby said shaft.

takes the thrust of the booms, a bucket mount- D ed on the'forward ends of said booms, and

means for extending said booms as the bucket.

booms being provided with arcuate arms for holding a bucket, vertical beamsmounted on the opposite sides ofv said tractor, and lugs` on said` booms and engaging said 'vertical beams when the booms are being raised. i

3. In a hydraulic digger and loader mounted upon a prime mover and provided with a bucket, a shaft at the rear of said tractor, said shaft being providedwith hubs, `telescoping booms positioned at the opposite sides of said prime mover, said boons being mounted upon of said tractor, and lugs mounted on said booms near the forward end thereof and @adapted to engage the .vertical beams `for guiding said booms as they are being raised to discharge the contents of the bucket.

tractor having rear guards, a shaft at the rear of the tractor and mounted on said guards, telescopiebooms positioned at the side walls and pivotally connected to said shaft whereby said shaft takes the thrust of the booms, a

bucket mounted on said booms, vertical beams mounted on the side walls of.. said tractor forguiding said booms, hydraulic :means for v raising and lowering of said bucket, and a three-part cable operated' by said .hydraulic means for raising said booms and bucket.

6. In a hydraulic digger and loader adaptfed to be mounted on a prime mover and provided .with a bucket, an auxiliary shaft at the rear of said tractor, said' shaft being proposi- Having thusv disclosed the invention, we

astings adapted to encircle said hubs, vcr` /tical beams mounted on the opposite sides.

tioned at the opposite sides of the prime mover, said booms being mounted in castings adapted to encircle said hubs, vertical beams mounted on the opposite sides of said tractor, and lugs mounted on said booms near the forward end thereof and adapted to engage the ver-tical beams'for guiding said booms as they arebeing raised the bucket.

7.' In a hydraulic digger and loader adapted to be mounted on a tractor provided with rear guards, a shaft attached to the guards,

telescoping booms positioned at the opposite` sides of the tractor, said booms being pivotally 'mounted on said shaft whereby said to discharge the contents of Y shaft takes the thrust of the booms, a bucket at the forward end of said booms, and means for raising and lowering said bucket and extending said booms.

8. In a hydraulic digger and loader adaptes,Y

ed to be mounted on a tractor, a cross member therefor, rear guards on said tractor and connected to said cross member, a shaftconn ected to the. guards, telescoping boomspositioned at the opposite sides of the tractor, said booms being pivotally mounted on said shaft whereby said shaft takes thethrust'of the booms, a bucket at the forward endof lsaid booms, and means for raising and lowering said bucket and extending said booms. j

v 9. In a hydraulic digger and loader adapted for attachment to a'tractor, telescoping booms positioned at the opposite sides of the tractor,means for pivotally mounting said booms rearwardly ofthe rear axle of said tractor whereby said mounting means takes the thrust of the booms, a bucket mounted on the forward ends of said booms, and upright members mounted on o posite sides of said tractor for guiding'said. ooms when the same are being raised or lowered.

10. In a hydraulic digger and loader adapted for attachment to a tractor, .telesco ing booms positioned at the opposite sides o the tractor, means lfor pivotally mounting said -booms rearwardly ofthe'rear axle of said tractor whereby said mounting means takes the thrust of the booms, a bucket mounted on the forward ends of said booms, llprilfhty 1.15`

members mountedon opposite sides of said tractor,.and means carried by said booms adapted to engage'said members for guiding said booms when the same are being raised or lowered. l v

11. In v"a hydraulic y'digger and loader adapted for attachment to a tractor, telescopic booms on opposite sides of the tractor,

an auxiliary shaft at the rear of said tractor on which said booms are pivotally mounted and which" is adapted to receive the force of the digging operation through said booms, hydraulic means for raising and lowering saidJ booms, said booms being extended when raised and retracted when lowered, a bucket.,

'at the front end of said booms and movable izo . therewith, and means for emptying the bucket n 12. In a hydraulic digger and loader adaptedfto be nounted onna tractor provided wlth` rear guards, telesco ic booms positioned at the opposite sides o said tractor, means for pivotallyfmountingv'said booms to'said rear guards whereby said mounting means takes the thrust of the booms, a bucket mounted on the forward ends of said booms, uprightmembers mounted on' opposite sides of said tractor, and meansfor guiding said booms alon said members when the same are being raise orlowered.

5.15 13. In a hydraulic digger and loader adapted to be mounted'ona tractor provided with rear guards., telescopic booms positioned at A the opposite sides of said tractor, means for pivotally mounting said booms on said rear guards and rearwardly of the rear axle of said tractor whereby said mounting means takes p. the thrust of the booms, uprlght members mounted on opposite sides'of said tractor and adjacent said booms, and means for guiding'said boomsialong said members when the same are bein'g'raised or lowered.

' In witness whereof, we hereunto subscribe our names to this speciication.

^ PAUL BLUMBERG.

' so FRANK G. HoUGH.

'as l. 

